POPOOLA, Osuolale Peter; SONUBI, Adegboyega Tajudeen. Investigating the Appropriate levels of NPK Fertilizers for Optimum Yield of Soybeans in South West Nigeria. Journal of Environmental and Agricultural Studies, [S. l.], v. 1, n. 1, p. 17–24, 2020. Disponível em: https://al-kindipublishers.org/index.php/jeas/article/view/863. Acesso em: 1 dec. 2025.